Product Designer

📍 Job Overview

Job Title: Product Designer

Company: Lago

Location: Paris, Ile-de-France, France

Job Type: FULL_TIME

Category: Product Design / GTM Operations

Date Posted: 2026-06-03

Experience Level: 5-10 years

Remote Status: Hybrid (Primary: Paris office, Secondary: Remote Europe)

🚀 Role Summary

• Drive end-to-end product design initiatives for a leading open-source billing platform, translating complex B2B workflows into intuitive user experiences.

• Spearhead the design of intricate B2B workflows encompassing billing, pricing, metering, invoicing, subscriptions, wallets, and analytics.

• Transform ambiguous and technical challenges into clear, user-friendly product solutions, leveraging rapid prototyping to validate concepts and accelerate decision-making.

• Foster close collaboration with engineering teams to ensure design integrity is maintained throughout the implementation phase, guaranteeing shipped product quality.

• Contribute to a culture of rapid iteration and continuous learning, utilizing AI tools to enhance design capabilities and stay ahead of market trends.

📝 Enhancement Note: While the title is "Product Designer," the responsibilities heavily involve designing complex B2B workflows within a fintech/billing context. This role has strong ties to Go-to-Market (GTM) operations by shaping the user experience of a critical financial platform, impacting revenue generation and customer adoption. The emphasis on AI-native workflows and shipping fast suggests a dynamic GTM environment.

📈 Primary Responsibilities

• Own the complete product design lifecycle, from initial problem definition and user research through to final product delivery and post-launch iteration.

• Design and iterate on complex user interfaces and workflows for B2B SaaS products, focusing on areas such as subscription management, usage-based metering, invoicing automation, and financial analytics dashboards.

• Conduct user research, usability testing, and A/B testing to gather insights and inform design decisions, ensuring solutions are data-driven and customer-centric.

• Develop high-fidelity prototypes and interactive design specifications in Figma, effectively communicating design intent and user flows to cross-functional teams.

• Collaborate effectively with Product Managers to define product strategy and roadmaps, ensuring design solutions align with business objectives and user needs.

• Partner with Engineering teams to ensure seamless implementation of designs, providing detailed specifications, assets, and ongoing support during development sprints.

• Champion design best practices, accessibility standards, and usability principles across the product development process.

• Leverage AI tools and methodologies to explore innovative design solutions, enhance workflow efficiency, and stay at the forefront of design technology.

📝 Enhancement Note: The input mentions "complex B2B workflows across billing, pricing, metering, invoicing, subscriptions, wallets, and analytics." This implies a deep dive into financial operations and revenue management systems, requiring the designer to understand GTM implications for pricing models and billing efficiency. The emphasis on "shipping fast" and "AI-native" suggests a need for designers who can quickly adapt to evolving product requirements and leverage new technologies for efficient design execution.

🎓 Skills & Qualifications

Education: While no specific degree is mandated, a strong educational background in Design, Human-Computer Interaction (HCI), Computer Science, or a related field is beneficial. Practical experience and a compelling portfolio often outweigh formal education.

Experience: 5+ years of hands-on experience designing and shipping high-quality digital products, with a significant focus on B2B SaaS, developer tools, fintech, or products involving complex workflows.

Required Skills:

• Proven track record in end-to-end product design, demonstrating proficiency in problem framing, UX exploration, visual design, and interaction details.

• Exceptional visual and interaction design skills, including mastery of typography, layout, information hierarchy, states, microcopy, and accessibility standards.

• Expertise in using design and prototyping tools, particularly Figma, for creating high-fidelity mockups and interactive prototypes.

• Experience designing for complex B2B SaaS environments, understanding the nuances of enterprise workflows and user needs.

• Ability to rapidly prototype using various tools, including Figma, code, or AI-assisted design platforms, to accelerate ideation and decision-making.

• Strong command of English, both written and spoken, for clear communication, stakeholder alignment, and effective articulation of design rationale.

• Experience integrating AI tools and workflows into the design process to enhance efficiency and explore novel solutions. Preferred Skills:

• Experience with open-source communities and platforms.

• Familiarity with billing, metering, subscription management, or fintech products.

• Experience designing for developer tools or infrastructure products.

• Knowledge of data visualization and dashboard design principles.

• Experience conducting user research and usability testing.

• Familiarity with agile development methodologies.

📝 Enhancement Note: The "AI-native" requirement is a significant differentiator, suggesting a need for candidates who actively integrate AI tools into their workflow. The explicit mention of "5+ years of experience designing and shipping high-quality digital products, ideally in B2B SaaS, developer tools, fintech, infrastructure, or complex workflow products" indicates a specific focus on complex, enterprise-grade solutions rather than consumer apps.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• A robust portfolio showcasing end-to-end product thinking, from problem identification and user research to detailed UX/UI design and shipped outcomes.

• Case studies that clearly articulate the design process, the challenges faced, the solutions implemented, and the measurable impact of the design work.

• Demonstrations of exceptional visual and interaction design skills, highlighting attention to detail in typography, layout, states, microcopy, and accessibility.

• Examples of rapid prototyping capabilities, showcasing the ability to quickly iterate on ideas and test concepts using tools like Figma or AI-assisted platforms.

• Evidence of designing for complex B2B workflows, ideally within fintech, SaaS, or developer tools sectors. Process Documentation:

• Case studies should detail the user-centric design process, including problem framing, ideation, user flow mapping, wireframing, prototyping, and usability testing.

• For each project, clearly outline the design rationale, the trade-offs considered, and how the final design addressed the identified user needs and business goals.

• Showcase collaboration with engineering and product teams, illustrating how design was integrated into the development lifecycle and how challenges were overcome during implementation.

• Demonstrate the ability to measure and articulate the impact of design decisions, using metrics where possible to show improvements in user engagement, task completion rates, or other relevant KPIs.

📝 Enhancement Note: The emphasis on "end-to-end product thinking," "shipped outcomes," and "problem framing" in the portfolio requirements strongly suggests that Lago expects candidates to demonstrate not just aesthetic design skills but also strategic problem-solving and the ability to drive product initiatives from concept to market. The "AI-native" requirement should also be reflected in portfolio examples, showcasing how AI tools were leveraged.

💵 Compensation & Benefits

Salary Range: 70,000 - 100,000 EUR per year

Benefits:

• Impactful Role: Opportunity to lead complex technical projects in a fast-growing, open-source company.

• High-Talent Collaboration: Work alongside top-tier technical and business professionals.

• Shape Fintech Future: Contribute to building the leading open-source billing platform.

• Hybrid Work Model: Flexibility with a primary focus on the Paris office and the option for remote work within Europe.

• Permanent Contract: Full-time, permanent employment contract.

• Visa Sponsorship: While not explicitly stated as provided, the role's location in France implies adherence to local labor laws and potential support for eligible candidates within the EU.

Working Hours: 40 hours per week, with flexibility offered through the hybrid work arrangement.

📝 Enhancement Note: The salary range provided is 70,000-100,000 EUR annually for a Product Designer with 5-10 years of experience in Paris, France. This range is competitive for senior design roles in major European tech hubs. The "Remote Europe" secondary location suggests that while the primary office is in Paris, the company offers some flexibility for candidates based elsewhere in Europe, though local employment laws would apply. The "Hybrid" work arrangement with a "Primary Location: Paris office" indicates a requirement for some in-office presence, likely for collaboration and team cohesion.

🎯 Team & Company Context

🏢 Company Culture

Industry: Fintech, SaaS, Open-Source Software. Lago operates at the intersection of financial technology and software-as-a-service, providing a critical infrastructure for SaaS companies to manage their billing and revenue. The open-source nature fosters a strong community and transparency.

Company Size: Lago is a rapidly growing startup, having raised over $22 million in funding from prominent investors like Y Combinator and FirstMark. While specific employee numbers aren't given, its funding and open-source traction (9,000+ GitHub stars) suggest a dynamic, agile, and scaling organization.

Founded: While the founding date isn't specified, the company's significant funding and community traction indicate it's an established yet fast-paced startup environment.

Team Structure:

• The hiring is for the Product team, indicating a collaborative environment where design works closely with product management and engineering.

• Design is a critical function, with the role expected to "own product design end-to-end," suggesting a high degree of autonomy and responsibility.

• Cross-functional collaboration is emphasized, particularly with engineers during implementation and product managers for strategy.

• The team values "reliability and proactivity," encouraging ownership, driving tasks to completion, and adaptability, alongside a "fail fast, learn fast" mentality. Methodology:

• Agile & Iterative: The emphasis on "ship fast," "try fast," and rapid prototyping points to an agile development methodology focused on quick iterations and user feedback.

• Data-Driven Design: While not explicitly detailed, the mention of "analytics" in the responsibilities and the general SaaS context implies that design decisions will be informed by data and user behavior.

• AI Integration: A core tenet is being "AI-native in how you work," meaning AI tools are expected to be integral to design, research, and prototyping processes.

• Community-Oriented: The open-source nature suggests an awareness and potential engagement with a broader developer community.

Company Website: https://www.getlago.com

📝 Enhancement Note: Lago's culture is characterized by speed, ownership, and innovation, particularly with the integration of AI. The open-source foundation also implies a commitment to transparency and community engagement. The "Product team" context suggests a collaborative environment where designers are empowered to make significant contributions.

📈 Career & Growth Analysis

Operations Career Level: This role is positioned as a senior Product Designer, requiring 5+ years of experience. It offers significant ownership and the opportunity to shape the foundational design of a critical B2B SaaS product. The "end-to-end" responsibility implies a lead or senior individual contributor role, not an entry-level position.

Reporting Structure: The role is within the Product team. While the direct reporting manager isn't specified, it's typical for senior designers to report to a Head of Product, Design Lead, or Head of Engineering in a startup environment. The emphasis on close collaboration with Product Managers and Engineers is paramount.

Operations Impact:

• The designer's work directly impacts Lago's core offering: a billing platform. This means design decisions have a direct influence on customer acquisition (ease of understanding pricing), retention (intuitive subscription management), and revenue generation (clear invoicing and metering).

• By creating intuitive workflows for complex billing scenarios, the designer helps Lago's customers simplify their own operations, thereby enhancing Lago's value proposition and competitive edge in the GTM space.

• The focus on "AI-native" workflows positions Lago and its design team as forward-thinking, which can attract both talent and customers. Growth Opportunities:

• Product Leadership: With proven success, opportunities for growth into a Design Lead or Head of Design role within Lago could emerge as the company scales.

• Specialization: Deepen expertise in fintech, billing systems, or complex B2B workflows.

• Skill Development: Continuous learning in AI-driven design tools, advanced prototyping techniques, and user research methodologies.

• Mentorship: Opportunity to mentor junior designers as the team grows.

• Strategic Influence: Contribute to product strategy and roadmap planning, influencing the future direction of the platform.

📝 Enhancement Note: This role offers significant growth potential for a Product Designer looking to make a substantial impact in the fintech and SaaS space. The emphasis on end-to-end ownership and innovation, particularly with AI, provides a strong foundation for career advancement within Lago.

🌐 Work Environment

Office Type: Hybrid work model. The primary location is the Paris office, suggesting a physical workspace designed for collaboration, team meetings, and focused work. The "Remote Europe" option indicates a modern, flexible approach to work arrangements.

Office Location(s):

• Primary: Paris, Ile-de-France, France. This offers access to a vibrant tech ecosystem and a central European hub.

• Secondary: Remote within Europe. This provides flexibility for candidates who may not be able to relocate to Paris but are within a commutable distance or can travel periodically.

Workspace Context:

• Collaborative Environment: The Paris office likely facilitates in-person collaboration, team brainstorming sessions, and spontaneous interactions crucial for design work.

• Tools & Technology: Access to industry-standard design tools (Figma) and expected integration of AI-assisted design tools. The company likely provides necessary hardware and software licenses.

• Team Interaction: Opportunities for direct interaction with product managers, engineers, and other stakeholders, fostering a cohesive product development culture.

Work Schedule: Full-time (40 hours/week) with a hybrid arrangement. This allows for a balance between structured in-office collaboration and flexible remote work, catering to productivity needs and work-life balance.

📝 Enhancement Note: The hybrid model in Paris, with a secondary remote option across Europe, offers a blend of in-person collaboration and flexibility. This environment is conducive to a design role that requires both deep focus and cross-functional teamwork.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: Review of resume and portfolio to assess experience, skills, and cultural fit.

• Design Challenge/Portfolio Review: A deep dive into the candidate's portfolio, discussing specific projects, design decisions, problem-solving approaches, and outcomes. This may include a take-home assignment or live design exercise.

• Cross-functional Interviews: Meetings with Product Managers and Engineers to evaluate collaboration style, technical understanding, and communication skills.

• Hiring Manager Interview: Final discussion with the hiring manager to assess overall fit, career aspirations, and alignment with company values.

Portfolio Review Tips:

• Highlight End-to-End Ownership: Clearly showcase projects where you owned the design process from problem framing to shipped product.

• Demonstrate Problem-Solving: For each case study, articulate the specific problem you were trying to solve, your thought process, and the rationale behind your design decisions.

• Showcase Complex Workflows: Emphasize experience with B2B SaaS, fintech, or complex technical products. Detail how you simplified intricate processes.

• Quantify Impact: Whenever possible, use metrics to demonstrate the success of your designs (e.g., improved conversion rates, reduced task completion time, increased user satisfaction).

• Illustrate AI Integration: If you've used AI tools in your design process, showcase how they enhanced your workflow, creativity, or efficiency.

• Visual Clarity & Craftsmanship: Ensure your portfolio is well-organized, visually appealing, and demonstrates exceptional attention to detail in UI and interaction design.

• Tell a Story: Frame each project as a narrative – the challenge, your approach, the solution, and the outcome.

Challenge Preparation:

• Understand Lago's Product: Thoroughly research Lago's billing platform, its target audience, and its competitive landscape.

• Anticipate B2B Workflow Challenges: Be prepared to discuss how you would approach designing complex financial workflows, considering user roles, data security, and integration needs.

• AI Tool Proficiency: Be ready to discuss your experience with AI design tools and how you would leverage them for this role.

• Communication & Collaboration: Prepare examples of how you collaborate with engineers and product managers, resolve design disagreements, and present design concepts to stakeholders.

📝 Enhancement Note: The interview process will heavily scrutinize the candidate's portfolio for evidence of end-to-end ownership, complex B2B design experience, and innovative approaches, particularly with AI. Candidates should be prepared to articulate their design process and demonstrate tangible outcomes.

🛠 Tools & Technology Stack

Primary Tools:

• Figma: The core tool for UI design, prototyping, and collaboration. Proficiency is essential for creating high-fidelity mockups and interactive prototypes.

• AI-Assisted Design Tools: Candidates are expected to be "AI-native" in their work, implying the use of AI tools for various design tasks such as ideation, content generation, image creation, or workflow automation (e.g., Midjourney, ChatGPT for copy, specialized AI plugins for Figma).

Analytics & Reporting:

• While not explicitly listed for the designer, familiarity with analytics platforms (e.g., Google Analytics, Mixpanel, Amplitude) can be beneficial for understanding user behavior and informing design decisions. CRM & Automation:

• Experience with CRM systems (e.g., Salesforce, HubSpot) or marketing automation tools is not a primary requirement for this design role but provides context for B2B SaaS environments.

📝 Enhancement Note: Proficiency in Figma is a baseline requirement. The emphasis on "AI-native" suggests that candidates should be comfortable and proactive in exploring and integrating emerging AI tools into their design workflow, going beyond basic Figma skills.

👥 Team Culture & Values

Operations Values:

• Reliability and Proactivity: Take ownership of tasks, drive them to completion, and anticipate needs.

• Excellence and Accountability: Strive for high-quality work and take responsibility for outcomes.

• Adaptability and Learning: Embrace change, learn from mistakes quickly, and avoid repeating errors.

• Speed and Motion: Prioritize shipping quickly and staying in motion, rather than over-perfecting in isolation.

• Craftsmanship: Maintain high standards for visual and interaction design details, even while moving fast.

Collaboration Style:

• Close Partnership: Work intimately with engineers during implementation to ensure design quality.

• Cross-Functional Alignment: Partner closely with Product Managers to align on strategy and user needs.

• Constructive Challenge: Communicate clearly, challenge assumptions constructively, and create clarity in ambiguous situations.

• AI-Augmented Collaboration: Leverage AI tools to enhance communication and accelerate collaborative processes.

📝 Enhancement Note: Lago's culture highly values speed, ownership, and continuous learning, with a strong emphasis on practical execution and adaptability. The "AI-native" requirement suggests a forward-thinking team that embraces new technologies to enhance collaboration and productivity.

⚡ Challenges & Growth Opportunities

Challenges:

• Designing Complex Workflows: Transforming intricate billing, pricing, and metering logic into intuitive and user-friendly interfaces presents a significant design challenge.

• Balancing Speed and Craft: Maintaining high standards of design quality and attention to detail while adhering to a "ship fast" philosophy requires excellent time management and prioritization skills.

• Integrating AI Effectively: Identifying and implementing AI tools that genuinely enhance the design process, rather than just being a novelty, requires continuous exploration and experimentation.

• Staying Ahead of Market Trends: Designing for the future of AI and billing platforms requires constant learning and foresight, ensuring Lago's product remains competitive.

Learning & Development Opportunities:

• Deep dive into Fintech & Billing: Gain specialized knowledge in the complex domain of SaaS billing and financial operations.

• AI Design Exploration: Become an expert in leveraging AI tools for design, research, and prototyping, staying at the forefront of technological advancements.

• Product Strategy Influence: Contribute to high-level product decisions and roadmap planning, gaining strategic experience.

• Growth within a Fast-Scaling Startup: Benefit from the rapid growth trajectory of Lago, with potential for increased responsibility and leadership opportunities.

• Open-Source Community Engagement: Learn from and contribute to a vibrant open-source community.

📝 Enhancement Note: This role offers substantial challenges in designing for complexity and integrating cutting-edge AI, balanced by significant growth opportunities in a high-potential fintech startup.

💡 Interview Preparation

Strategy Questions:

• How would you approach designing a new feature for metered billing for a SaaS product, considering various pricing tiers and usage patterns? (Focus on problem framing, user flows, and trade-offs.)

• Describe a time you had to simplify a complex technical concept or workflow for end-users. What was your process, and what was the outcome? (Demonstrates ability to translate complexity.)

• How do you leverage AI tools in your design process? Provide specific examples of how AI has helped you be more efficient or creative. (Addresses the "AI-native" requirement.) Company & Culture Questions:

• What excites you about Lago's mission and its open-source approach to billing? (Shows research and alignment.)

• How do you embody Lago's values of reliability, proactivity, and learning fast in your work? (Assesses cultural fit.)

• Describe your experience working in a fast-paced startup environment and how you handle rapid iteration and changing priorities. (Evaluates adaptability.) Portfolio Presentation Strategy:

• Structure Your Narrative: For each case study, clearly outline the problem, your role, your design process, the challenges encountered, your solutions, and the measurable outcomes.

• Highlight End-to-End Ownership: Emphasize projects where you took initiative and drove the design from conception to completion.

• Showcase Complex B2B Designs: Focus on projects that demonstrate your ability to design for intricate workflows, ideally in fintech or SaaS.

• Articulate Your "Why": Be prepared to explain the rationale behind every design decision, demonstrating strategic thinking.

• Demonstrate AI Integration: If applicable, show where and how you used AI tools to enhance your work.

• Be Ready for Live Exercises: Prepare for potential live design challenges or whiteboarding sessions that test your problem-solving skills and design thinking in real-time.

📝 Enhancement Note: Interview preparation should focus on demonstrating end-to-end product thinking, experience with complex B2B workflows, and a genuine integration of AI into the design process. Candidates should be ready to articulate their problem-solving approach and design rationale clearly.

📌 Application Steps

To apply for this Product Designer position:

• Submit your application through the provided link on Ashby.

• Tailor Your Resume: Highlight experience in B2B SaaS, fintech, complex workflows, and any use of AI in design. Quantify achievements where possible.

• Curate Your Portfolio: Select 3-5 of your strongest end-to-end product design case studies. Ensure they clearly showcase problem framing, UX/UI design, interaction details, and shipped outcomes, with a particular focus on complex B2B scenarios and any AI integration.

• Prepare Your Narrative: Practice walking through your portfolio projects, clearly explaining your design process, the challenges you faced, your solutions, and the impact of your work.

• Research Lago: Understand their product, target market, open-source model, and company values to articulate your interest and cultural fit. Be ready to discuss how your skills align with their mission.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.

---